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A&A 418, 699-702 (2004)
DOI: 10.1051/0004-6361:20035695

On the spin evolution of neutron stars in pre-low-mass X-ray binaries

S. B. Popov<sup>1, 2

1</sup>  Università di Padova, Dipartimento di Fisica, via Marzolo 8, 35131 Padova, Italy
²  Sternberg Astronomical Institute, Universitetski pr. 13, 119992 Moscow, Russia

(Received 17 November 2003 / Accepted 2 February 2004 )

Abstract
We present a simple model for the evolutionary states of neutron stars in pre-low-mass X-ray binaries during the main sequence stage of donor stars. It is shown that for typical parameters some of the neutron stars in these systems cannot accrete matter from winds of their companions in a stable way. Accretors are found if neutron stars have magnetic fields about 10¹³ G and higher and/or in close systems with orbital periods of about a few days and shorter.

Key words: stars: binaries (including multiple): close -- stars: neutron -- stars: evolution -- X-rays: stars

© ESO 2004

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